Thimble for stovepipes



(No Model.) 2 Sheets-Sheet 1. F. A. PETERS.

T'HIMBLE FOR STOVEPIPES. No. 476,300. I Patented June 7,1892.

WITNEEEIEE.

INJENTEIR;

(No Model.) Sheets-Sheet 2.

F. A. PETERS.

THIMBLE FOR STOVBPIPES.

N0.4'76,300. Patented June 7,1892.

%/Z@m- 1 at W UNITED STATES PATENT OFFICE.

FRED A. PETERS, OF SOIO, MICHIGAN.

'THIMBLE FOR STOVEPIPES.

SPECIFICATION forming part of Letters Patent No. 476,300, dated June 7,1892.

Application filed February 8. 1892.

Serial No. 420,770. (No model.)

To all whom it may concern.-

Be it known that I, FRED A. PETERS, of Scio, in the county of VVashtenawand State of Michigan, have invented certain new and useful Improvementsin Thimbles for Stovepipes, of which the following, taken in connectionwith the accompanying drawings, is a specification.

My invention consists in the combination in a thimble, of an interiorand exterior cylinder of sheet metal. These two cylinders are unitedtogether, leaving an air-space between them, a part or the whole of theinterior cylinder being corrugated, so as to form by its corrugations ascrew-thread adapted to receive a corresponding screw-like corrugationon the end of the pipe which it is destined to receive, the object beingto furnish a cheap thimbleinclosing within itself an airspace to protectany combustible material in the wall through which it passes from fire;also, to provide a suitable screw-thread by means of which the stovepipemay be readily and firmly attached. These objects I attain by themechanism shown in the accompanying drawings, in which Figure 1 shows avertical section of a part of a chimney and wall, also of one of myimproved thimbles and a portion of a stovepipc attached to the same. ofthe parts shown in Fig. 1. Fig. 3 is a vertical section showing amodified form of my thjmble as the same would be made when applied to awall through which it is desired to pass a flue.

In the drawings, Fig. 1, WV represents the wall as usually made of lathand plaster, and 0 one side of a chimney-wall. The thimble consists of asheet-metal piece, one member of which T forms a flange, which restsagainst the wall W, as shown in Fig. 1. This sheet metal continues inthe form of a cylinder T into the interior of the chimney-flue and at Treturns within itself and forms a smaller Fig. 2 is an elevationstovepipe P is corrugated at P, so as to be adapted to be screwed intothe corrugations T of the cylinder, the end of the pipe being indicatedby the lines P P In the modification shown in Fig. 3 the thimble has thesame flange T which rests against the side of the wall W, and the mem'ber T forming the outer cylinder, passes through to the side W of thewall, as shown in Fig. 3, and thence it returns from the point T as aninner cylinder T to the flange T, this inner cylinder being corrugatedthroughout its length, if desirable; or it may be corrugated from eachend inwardly, leaving an inner section cylindrical to correspond withthe part T of Fig. 1. The two sections of the pipe that form the flueare represented by P and R, their ends being indicated, respectively, bythe lines L L.

I do not wish to confine myself to any particular construction as tomethod of uniting the parts that constitute this thimble, nor to thethickness of the air-space between the two cylinders.

I claim- In a thimble, the combination of an exterior cylinder with aninterior cylinder, the said interior cylinder being provided withcorrugations and so located in regard to the outer cylinder that asurrounding airspace is formed between the two said cylinders,substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, on this 5th day of February, A.D. 1892.

FRED A. PETERS.

Witnesses:

FRANK G. PARKER, MATTHEW M. BLUNT.

